Fox, Charles. <br/><br/>
Educational psychology :  its problems and methods. 

 - 4th ed., rev. and rewritten. 
 - London :  Routledge & K. Paul,  [1950] 
 - International library of psychology, philosophy, and scientific method .
<br/><br/>Bibliographical references: p. 369-380. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Educational psychology.